I want to watch a set of BitCoin addresses and be notified (preferably by email) when they receive a payment.
I prefer me not to write my own software for this and not to install it on my own server, ...

From my understanding, Taproot uses a Merkle Tree structure whose root represents the outcome of a script. That representation is in the form of a signature that may unlock the inputs associated with ...

Is it possible to manually create a Hash Time Locked Contract using the bitcoin-qt command line?
I have dabbled with manually creating createrawtransaction / sendrawtransaction using the bitcoin-qt ...

The Ethereum ERC20 token is also the contract. The token can never live without the contract. The name of the contract is the name of the token. In the code, the keyword is contract and not token.
I ...

I've just read about Ardor's lightweight smart contracts: https://medium.com/coinmonks/lightweight-contracts-b738b6e29377
Is there an example and tutorial of how to make use of these smart contracts ...

Is it possible for a company to raise funds through an ICO even if it is not a startup? For example: Say company X manufactures chocolates but now it wants to further expand its operations and needs ...

I am studying to write smart contract and see that there are some token standards such as ERC20. My question is: what is the purpose of those standards ? Why do we need to add those interface to our ...

Suppose Alice has 1 BTC, Bob has 1 LTC, and Carol has 1 NMC. Alice wants NMC for BTC, Bob wants BTC for LTC, and Carol wants LTC for NMC. Assume each cryptocurrency has the same value and can be 1-to-...

If I have a Blockchain which consists of few smart contracts. Let's say that the Blockchain consists of 2000 blocks. When a new block is added to the Blockchain then does the smart contract runs on ...

I am relatively new to blockchain technology, and my only knowledge is relative to the way bitcoin blockchain works. I know it is based on mining and and transfer of value that gets scarce whenever ...

Is it possible to store an encrypted message in the blockchain that reveals itself only when a particular condition is met?
I think that the conditional disclosure can be done with Smart Contracts, ...

Are Ethereum Tokens issued in an ICO similar to stocks on a stock market? In which ways are they similar, and in which ways are they not?
To give some background to my question. I just joined an ICO ...

There're some smart contracts that only checks whether certain conditions are met. On the other hand, there're some other contracts that keep some state and the state changes by transactions calling ...

Following my previous question on this topic Is there a way to store and share a private key through blockchain?, I might have a solution but I would like to improve the process.
Image that A is the ...

I understand that a smart contract is just a fancy term for code that just does something with accounts in an immutable blockchain. A good example is, if you wanted to send your friend 1 coin a week ...

Are contracts described here already available for use? This source claims that "Ethereum style contracts" will be available in June. Is this correct? How are Ethereum style contracts different from ...

I am a noob, so please bear with me.
I'm wondering whether the Bitcoin Core team plans to integrate a smart contract feature evolving the Bitcoin scripting language in a more sophisticated one in the ...

How smart property works on basic bitcoin blockchain? I am not sure that how to make token, that is tied with a particular object, on the bitcoin blockchain. I've already know I can use such kind of ...

Is there a place where I can bet on the price of Brent crude oil? For example, I bet 1 BTC and:
if the oil price increases by 1%, I will lose the bet.
if the oil price decreases by 1%, I will double ...

I am wondering - is it possible to delete a single element of an array in Ethereum without having to create a new array and copying the entire array? Reading some of the documentation, I can't seem to ...

I am wondering who pays the fees for transactions initiated by a smart contract in Ethereum?
For example, if I have a contract that simply forwards any payment made into it to someone else, does the ...